<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <style>
    *{margin: 0;padding: 0}
  </style>
</head>
<body>
  <div id="app">
      <button @click="(msg=`hello guigu`);(msg2=`yyy`)">click</button>
      <br>
      <strong>{{msg}}</strong>
      <br>
      <strong>{{msg2}}</strong>
  </div>
</body>
<script src="./js/vue.js"></script>
<script>
    new Vue({
      el:"#app",
      data:{
          msg:"hello vue",
          msg2:"xxx"
      },
      // methods:{
      //     handleTest(){this.msg = `hello guigu`},
      // }
    });
</script>
</html>